feat: add stickers

migrations/0055_reward_gifts.down.sql

@@ -0,0 +1,12 @@
+DELETE FROM sadhna_reward_grants WHERE source = 'gift';
+
+DROP INDEX IF EXISTS sadhna_reward_grants_unopened_idx;
+DROP INDEX IF EXISTS sadhna_reward_grants_gift_uniq;
+DROP INDEX IF EXISTS sadhna_reward_grants_streak_uniq;
+
+ALTER TABLE sadhna_reward_grants ALTER COLUMN milestone SET NOT NULL;
+ALTER TABLE sadhna_reward_grants
+    ADD CONSTRAINT sadhna_reward_grants_user_id_milestone_key UNIQUE (user_id, milestone);
+
+ALTER TABLE sadhna_reward_grants DROP CONSTRAINT IF EXISTS sadhna_reward_grants_source_check;
+ALTER TABLE sadhna_reward_grants DROP COLUMN IF EXISTS source;